From a group of 10 children, a team of 5 (the red team) is randomly chosen. The remaining 5 children are in the blue team. Two of the children, Andy and Ollie, are best friends. What is the probability they get, to be on the same team? (the answer is 28/63, but I dont know how to get the top number)

From a group of 10 children, a team of 5 (the red team) is randomly chosen. The remaining 5 children are in the blue team. Two of the children, Andy and Ollie, are best friends. What is the probability they get, to be on the same team? (the answer is 28/63, but I dont know how to get the top number)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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